kacallap ALLAP-W1-2 Kit Omnidirectional UHF Wireless Lavalier Microphone System with 1 Receiver, 2 Transmitter, A/B Group Total 100 Channel for Canon Nikon Sony Cameras, XLR Camcorder, Phone - InUS-S-0502052

• With 2 groups (A and B) total 100 selectable channels. A range：538.0 ~ 557.6MHz, B range：566.4 ~ 586.0MHz. the working distance is up to 330-feet in open areas or 200-feet with obstacles. The RF power output can be switched between high, medium and low settings. A dedicated headphone jack is handy for audio monitoring, ensuring accurately adjust levels for optimum audio quality. Adopt digital phase-locked loop synthesizer, high RF frequency accuracy. Large HTN display screen: 20*42mm,display intuitive, easy to adjust parameters.Audio output mode indicates that the system defaults to MIX output. MIX: MIX the audio of channel A and channel B to the left and right channels. DUAL MONO: two MONO outputs, left(group B) and right(group A) audio will be output separately. The Transmitter Equipped with high quality omnidirectional capacitive microphone. Record professional audio without distortion to your DSLR, camcorder, or portable recorder. Perfect for filmmaking, ENG, EFP, interviews, and more Powered by Two AA batteries(battery not include) (alkaline battery, nickel metal hydride battery)or 5.0v DC external microUSB power supply. When using external microUSB power supply, the battery in the battery compartment can be charged at the same time. (Note: when charging, please make sure that the battery in the battery compartment is rechargeable battery, to avoid unnecessary accidents)